- I takt med att Liftarens guide-trilogin utökades till både fyra och fem delar hade Adams vissa svårigheter att hålla uppe den briljanta nivån på prosan, men när han började på nytt med Dirk Gentlys holistiska detektivbyrå (1987) blev det en nytändning och ett mästerverk. Följande passage ur boken behandlar den så kallade kattdörren, som en halsbrytande illustration till distinktionen mellan upptäckt och uppfinning:
- "Sir Isaac Newton, renowned inventor of the milled-edge coin and the catflap!"
"The what?" said Richard.
"The catflap! A device of the utmost cunning, perspicuity and invention. It is a door within a door, you see, a ..."
"Yes," said Richard, "there was also the small matter of gravity."
"Gravity," said Dirk with a slightly dismissed shrug, "yes, there was that as well, I suppose. Though that, of course, was merely a discovery. It was there to be discovered." ... "You see?" he said dropping his cigarette butt, "They even keep it on at weekends. Someone was bound to notice sooner or later. But the catflap ... ah, there is a very different matter. Invention, pure creative invention. It is a door within a door, you see."
- En fråga inom kosmologin som jag då och då haft anledning att snudda vid här på bloggen är det så kallade finjusteringsproblemet - hur kommer det sig att naturlagarnas konstanter antar värden som på ett vad det verkar närmast mirakuöst vis passar för uppkomsten av liv? Vanliga försök till svar inbegriper existensen av antingen en Gud eller ett mutiversum. En helt annan förklaring går ut på att finjusteringsproblemet är ett missförstånd grundat i våra alltför snäva idéer om hur liv, intelligens och medvetande kan te sig, och formulerades på följande vis av Adams i ett föredrag i Cambridge 1998:
- Imagine a puddle waking up one morning and thinking, "This is an interesting world I find myself in — an interesting hole I find myself in — fits me rather neatly, doesn't it? In fact it fits me staggeringly well, must have been made to have me in it!"
- This is such a powerful idea that as the sun rises in the sky and the air heats up and as, gradually, the puddle gets smaller and smaller, it's still frantically hanging on to the notion that everything's going to be alright, because this world was meant to have him in it, was built to have him in it; so the moment he disappears catches him rather by surprise. I think this may be something we need to be on the watch out for. We all know that at some point in the future the Universe will come to an end and at some other point, considerably in advance from that but still not immediately pressing, the sun will explode. We feel there's plenty of time to worry about that, but on the other hand that's a very dangerous thing to say.
- Det talas mycket om jordens undergång, men det mesta som sägs är strängt taget ovederhäftigt, genom att det förbiser följande viktiga distinktion, som Adams föredömligt besserwisseraktigt framhöll i ett föredrag på UC Santa Barbara kort före sin död:
- We don't have to save the world. The world is big enough to look after itself. What we have to be concerned about is whether or not the world we live in will be capable of sustaining us in it.
- Jag har inte läst Adams postumt publicerade The Salmon of Doubt, men följande ofta citerade observation ur boken synes mig insktsfull och väsentligen korrekt:
- I've come up with a set of rules that describe our reactions to technologies:
1. Anything that is in the world when you’re born is normal and ordinary and is just a natural part of the way the world works.
2. Anything that's invented between when you’re fifteen and thirty-five is new and exciting and revolutionary and you can probably get a career in it.
3. Anything invented after you're thirty-five is against the natural order of things.
